Simulation of plant cell shrinkage during drying : A SPH–DEM approach

Karunasena, H.C.P., Senadeera, Wijitha W., Brown, Richard J., & Gu, YuanTong (2014) Simulation of plant cell shrinkage during drying : A SPH–DEM approach. Engineering Analysis with Boundary Elements, 44, pp. 1-18.

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Plant based dried food products are popular commodities in global market where much research is focused to improve the products and processing techniques. In this regard, numerical modelling is highly applicable and in this work, a coupled meshfree particle-based two-dimensional (2-D) model was developed to simulate micro-scale deformations of plant cells during drying. Smoothed Particle Hydrodynamics (SPH) was used to model the viscous cell protoplasm (cell fluid) by approximating it to an incompressible Newtonian fluid. The visco-elastic characteristic of the cell wall was approximated to a Neo-Hookean solid material augmented with a viscous term and modelled with a Discrete Element Method (DEM). Compared to a previous work [H. C. P. Karunasena, W. Senadeera, Y. T. Gu and R. J. Brown, Appl. Math. Model., 2014], this study proposes three model improvements: linearly decreasing positive cell turgor pressure during drying, cell wall contraction forces and cell wall drying. The improvements made the model more comparable with experimental findings on dried cell morphology and geometric properties such as cell area, diameter, perimeter, roundness, elongation and compactness. This single cell model could be used as a building block for advanced tissue models which are highly applicable for product and process optimizations in Food Engineering.

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5 citations in Web of Science®

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ID Code: 70994
Item Type: Journal Article
Refereed: Yes
Keywords: SPH, Meshfree methods, DEM, Plant cells, Numerical modeling, Drying
DOI: 10.1016/j.enganabound.2014.04.004
ISSN: 0955-7997
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
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Copyright Owner: Copyright 2014 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Engineering Analysis with Boundary Elements. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Analysis with Boundary Elements, [VOL 44, (2014)] DOI: 10.1016/j.enganabound.2014.04.004
Deposited On: 05 May 2014 00:38
Last Modified: 02 Jul 2016 22:44

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